Exploring the size of the lipophilic unit of the soluble epoxide hydrolase inhibitors
摘要:
Soluble epoxide hydrolase (sEH) inhibitors are potential drugs for several diseases. Adamantyl ureas are excellent sEH inhibitors but have limited metabolic stability. Herein, we report the effect of replacing the adamantane group by alternative polycyclic hydrocarbons on sEH inhibition, solubility, permeability and metabolic stability. Compounds bearing smaller or larger polycyclic hydrocarbons than adamantane yielded all good inhibition potency of the human sEH (0.4 <= IC50 <= 21.7 nM), indicating that sEH is able to accommodate inhibitors of very different size. Human liver microsomal stability of diamantane containing inhibitors is lower than that of their corresponding adamantane counterparts.
Condensation of Diamantan-3-one with Malononitrile and Methyl and Ethyl Cyanoacetates in the Presence of Binder-Free FeHY and NiHy Zeolites
作者:R. I. Khusnutdinov、N. A. Shchadneva、Yu. Yu. Mayakova、R. I. Aminov
DOI:10.1134/s1070428021060105
日期:2021.6
Binder-free iron- and nickel-containing micro-, meso-, and macroporous zeolites FeHY and NiHY were found to effectively catalyze Knoevenagel condensation of diamantan-3-one with malononitrile, methyl cyanoacetate, and ethylcyanoacetate at 40°C (5 h) with 94–98% yield.
We have developed an effective approach to 1,2‐disubstituted diamondoids by palladium(II) acetate catalyzed functionalization of CH bond. Selective mono‐arylation of the adamantane framework was achieved using picolylamide as a directing group in yields up to 87 %. Kinetic studies in combination with deuterium labeling experiments, competitive experiments and mass spectrometry contribute to the mechanistic
Preparation of Crowded Olefins. Alkylidenation of Polycycloalkanones by Corey Homologative Epoxidation Followed by Reaction with Lithium Dialkylcuprates and with Thionyl Chloride
作者:George A. Olah、An-hsiang Wu
DOI:10.1055/s-1990-27043
日期:——
Preparation of crowded olefins from polycycloalkanones via Corey homologative epoxidation by trimethylsulfoxonium iodide/potassium tert-butoxide followed by reaction with lithium dialkylcuprates and thionyl chloride giving the corresponding alkylidenepolycycloalkanes is reported.
Direct Exploitation of the Ethynyl Moiety in Calcium Carbide Through Sealed Ball Milling
作者:Abolfazl Hosseini、Peter R. Schreiner
DOI:10.1002/ejoc.202000612
日期:2020.8.2
Sealedballmilling provides a novel way of activation of calciumcarbide. No additive is required to transfer the acetylide moiety to organic molecules. Various ketones and even aryl halides can thereby be ethynylated.